1.34pm: an American stops jogging and asks if she is okay. A minute later, an Irishman stops.

1.38pm: a woman is distraught at the sight of Katy. She falls to the ground and asks: "Do you need help? What shall I do?"

1.43pm: a women jogger stops but then two men run past.

1.46pm (pictured): a young man walks past, rubbernecking a few seconds later. A man in his forties takes a break from jogging to inquire if Katy is okay, while a lanky teenage boy wearing earphones wanders past.

1.54pm (pictured): a jogger in a bright red T-shirt suffers a pang of conscience.

1.57pm: a young man passes, followed by four Spanish girls, who point but fail to stop. 2pm: a man in a dark tracksuit strides purposefully past before turning to look, and an elderly woman quickens her pace.

2.03pm (pictured): three men in their twenties run past but all turn around and check on Katy.

2.06pm (pictured): A woman stops immediately and asks if everything is all right. A man in jogging clothes bounds past and another follows.